Internal-grinder.



J.'WILSON.

INTERNAL GRINDER. APPLICATION HLED Dic. 7. 1914.

Patented' oct. 19,- 1915.

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I. WILSON.

INTERNAL GRINDER.

APPLICATION FILED DEC. 7. |914.

1,156,962. .Patented 0616. 19, 1915.

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mirra STATES? Permanentes.

Jai/rus witsoivror warna'rown, SOUTH DAKOTA.

INTERNAL GRiivnEitg. y

To all whom t may concern."

Be vit known that l, JAMES WILSON, a citi- Zen of the United States, residing at Watertown, in the county of Codington and vState of South Dakota, have invented. certain new and useful Improvements in lnternal Grinders; and l do declare the following to be a full, clear, and exact description of the invention, such as 'will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked` thereon, whichy form a part of this specification. 1

This invention relates to improvements in what may be termed inside grinders.

The invention has for its object to provide facilities for effecting'the ready adjustment of the grinding tool to thel work in hand, especially in grinding interior annular surfaces. Y l, i ,i

further objectis to provide'for an oscillatory movement or'pivoting of the mandrel- Y carrying member or holder for the requisite application of the grinding tool in suitably reaching such inside or interior surfaces; f j

A still further object is to provide for the longitudinal or axial movement or adjustment of the grinding tool mandrel and t provide for this manually. Y

Ai still further object is to provide for carrying out the aforesaid ends in a simple, expeditious and effective manner and with facility.

The invention thereiore consists of certain instrumentalities and features of construction substantially as hereinafter fully disclosed and defined by the appended claims.

ln the accompanyingdrawings is illustrated the preferred embodiment of my invention' wherein it will be understood that various changes and modifications may be made as to the detailed construction and arrangement of parts without departing from the scope of the appended claims, and in which drawings- Figure 1 is a longitudinal sectional eleva.- tion, partly in side view, of my invention.

2 is an end elevation `of the same.` Fig.

3 is a transverse section taken on the line Sw?) of Fig. Fig. 4: is a likesection taken on the line lf-l of the same `figure.

In carrying out my` invention provide for suitably mounting a suitable support or bracket designated generally as 1, preferably ofthe general structural Voutline as disclosed Y Specification of Letters lPatent.

Patentedfct. 19,191.1,5v

`Application le. December 7., 1914. Serial Nof8775,821.

particularly in Fig. 1, said bracket or support comprising a central frame-like member 2 with an open-ended tubular member?) .extending horizontally therethrough and preferably integral therewith or otherwise fixed thereto,to receive and form a bearing for a mandrel 4 splined,feathered or slid-y able as at 5, thereon, apulley 6 fortransmittingmotion to said shaft, a ls uitablefbelt 7 being applied to said pulley and 'driven from a suitable motor (not shown) as' usual.VY

The bracket or support 2 has ythreaded into its lower end a screw-threaded terminal Vor stein 8, thus adapted for adjustable connection therewith to provide for the vertical adjustment.- or raising and lowering of the bracketor support as conditions may call for in the usevof the tool. rlhe stem or2 terminal 8 projects :froma ball or spherical member f), of whichit is a part, said ball or spherical member being seated within a correspond- 1 ingly formed socket 10 inthe upper end of a post llsuitably anchored in a base orA v pedestal 12 suitably secured or bolted to the c lfloor, as is obvious from Figs. 1 and 2. The

anchoring ofsaid post is preferably edeeted by reducing the same diametrically as at 11a the resultant reduced portion being passed through a passage 13 centrally in the base 12, the shoulder' formed by such reduction resting above the latter and upon a washer 15 preferably vinterposed between said shoulder and the top of said base, the lower end of said reduction 1la having applied thereto a nut 16 firmly securing the saine in fixed relation top tliegbase. Thesef however-it` will be understood are matters of detail, which maybe substituted by other i' means lhaving' in view the same end, without any departure from the invention. rlhe above described manner of mounting the' the slidable connection therebetweemcarries f at one end, beyondthetubular support or bearing 3,- the `lgrinding' tool l18 which is controlledby the operator grasping a handle -19 outstanding from a frameflike member 20,

with right-angled Vannular end portions 21,V

one embracing the mandrel and conned between the grinding tool and a fixed collar 22 upon the mandrel, and the other annular end portion embracing and guided upon the tubular member or bearing 3, whereby, it is apparent that-as the handle 19 may be manipulated by the operator, the grinding tool with the mandrel, may be moved longitudinally in suitably engaging the grinding tool with the object being operated upon, as is lextended in normal relation with said driving belt, the connection between said spring and saic trame-like supportbeing provided for preferably by a screw-eye 2l secured in the upper end of said support, said spring being suitably anchored to the 'floor as at 25 in any suitable way.

lt is not thought that further or extended description is necessary to disclose the advantages and operation of my invention as the same are believed to be fully apparent from the foregoing.

I claiml. A device of the character described including a lSlidable tool mandrel, a driving pulley thereon having a sliding connection therewith, a bracket for said mandrel, a base, a pivoted connection between said base and bracket and resilient means connected to said bracket to yieldingly retain the same 1n operative position.

2. A device of the type described, including a bracket or support, comprising a grinding tool equipped mandrel, a frame-like member having a tubular bearing extending from said frame-like member, said mandrel being equipped with a driving pulley having a sliding connection with said mandrel, and means Vfor supporting said frame-like member, having adjustable connection therewith and a post, said adjustable connection having a ball and socket joint connection with said post,

3. A device of the character described, including a vslidable ltool mandrel, a driving pulley'thereon having a sliding connection therewith, a bracket for said mandrel, a base, a ball and socket connection between said base and said bracket and resilient means connected to said bracket to yieldingly retain the same in operative position.

In testimony whereof, l ailix my signature, in presence of two witnesses.

JAMES VVLSON.

Witnesses 1 Y Copies of this patent may be obtained for ve cents each, b y addressing the Commissioner of Patents, Washington, ID. C. 

